List of top Questions asked in CBSE CLASS XII

List two essential roles of the ribosome during translation.

Depending upon the chemical nature of the template (DNA or RNA) and the nature of nucleic acids synthesised from it (DNA or RNA), list the types of nucleic acid polymerases.

From the differential equation of the family of circles touching the y-axis at the origin.

If the sequence of the coding strand in a transcription unit is written as follows: 

5-ATGCATGCATGCATGCATGCATGCATGC-3

 Write down the sequence of mRNA.

A fruit grower can use two types of fertilizer in his garden, brand P and brand Q. The amounts(in kg) of nitrogen, phosphoric acid, potash and chlorine in a bag of each brand are given in the table. Tests indicate that the garden needs at least 240kg of phosphoric acid at least 270kg of potash and at most 310kg of chlorine. If the grower wants to minimize the amount of nitrogen added to the garden, how many bags of each brand should be used? What is the minimum amount of nitrogen added in the garden?
 

For each of the differential equations given below, indicates its order and degree (if defined).

\((i) \frac {d^2y}{dx^2}+5x(\frac {dy}{dx})^2-6y=log\ x\)

\((ii)(\frac {dy}{dx})^3-4(\frac{dy}{dx})^2+7y=sin\ x\)

\((iii) \frac {d^4y}{dx^4}-sin(\frac {d^3y}{dx^3})=0\)